Single acting hollow (feedthrough) jack widely used in construction, bridge construction, road and railway construction thin jack, power station construction electric hydraulic jacks, lifting equipment, machinery demolition aspect, hollow jack with a pull-up, the central hole can be powered wire, steel, etc. through 320 jack, center air can be processed according to user needs, users can request the production of different specifications, different travel hollow jack, optional hydraulic station, single-acting manual pump. Work of hydraulic jacks no oil pressure causes: 1. Hydraulic jacks are also working normally, with no oil pressure gauge may be damaged or clogged gauge bollard, with the change or clear the table column pressure gauge on it. 2. Electric pump station because of damage caused by a hydraulic jack does not work, there is no oil pressure; then you can see if the motor is switched on or if stuck not work; or view the commutation valve lever in what position on the jack, whether in the working position. 3. See hydraulic jack connectors is intact, with or without leakage phenomenon, the case of problems with the joints can change connectors, pay attention to the specifications and connection with the change when the joint. The hydraulic jack working there non-work, including the partial load using hydraulic jacks, hydraulic jacks are wrong overload, will lead to a hydraulic jack does not work, the solution is to follow these instructions for proper use of hydraulic jacks ; hydraulic caused by improper use of hydraulic jacks and jack damage caused to promptly returned for repair, we have competing Hydraulic hydraulic jacks maintenance services, and the quality of Three Guarantees. This is a common hydraulic jack hydraulic pressure without some reason, I hope we can be helpful to use a hydraulic jack. Thin jack, Lu of the hydraulic jack provided by the Texas Lu of the hydraulic machinery plant. Texas Lu force hydraulic machinery plant (www.luliyeya.com) is an industry leader in Shandong Dezhou, hydraulic machinery and parts, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Lu Hydraulic leadership with the staff warmly welcome all inquiries negotiations to create Lu Hydraulic better future.